The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 2016
Filed:
Nov. 09, 2012
Applicant:
Takeshi Nobukawa, Toyota, JP;
Inventor:
Takeshi Nobukawa, Toyota, JP;
Assignee:
TOYOTA JIDOSHA KABUSHIKA KAISHA, Toyota-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01D 50/00 (2006.01); B01D 53/56 (2006.01); F01N 3/08 (2006.01); B01D 53/94 (2006.01); B01J 23/72 (2006.01); B01J 23/83 (2006.01); B01J 23/89 (2006.01);
U.S. Cl.
CPC ...
B01D 53/565 (2013.01); B01D 53/9418 (2013.01); B01D 53/9431 (2013.01); B01J 23/72 (2013.01); B01J 23/83 (2013.01); B01J 23/894 (2013.01); B01J 23/8926 (2013.01); F01N 3/08 (2013.01); B01D 2251/2062 (2013.01); B01D 2255/106 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/20746 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/50 (2013.01); B01D 2255/65 (2013.01); B01D 2255/904 (2013.01); B01D 2257/404 (2013.01); F01N 2510/0682 (2013.01); F01N 2560/026 (2013.01);
Abstract
A catalyst system for exhaust gas purification which comprises a first-stage base metal catalyst located upstream and a second-stage base metal catalyst located downstream, wherein the first-stage base metal catalyst comprises at least one oxide support selected from the group consisting of alumina, ceria, zirconia, yttria, and titania and Cu metal and/or a Cu oxide supported thereon, and in cases where the amount of NOx in the exhaust gas has become or exceeded an NOx criterion, the state of the exhaust gas is switched from slightly rich to rich.